Automatic milling-machine.



No. 636,9!7. Patented-Nov. l4, I899. 0. MERGENTHALER.

AUTOMATIC MILLING MACHINE.

(Application filed May 12, 189B.)

4 Sheets-Sheet I (No Model.)

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N0. 636,9I7. Patented Nov. l4, I899. 0. MEBGENTYHALER.

AUTOMATIC MILLING MACHINE.

(Application filed May 12, 1898.)

(No Model.) 4 Sheets-Sheet 3.

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mfsmen. Patented Nov. l4, I899. o. MEBGENTHALER. AUTOMATIC MILLING MACHINE.

(Application filed May 12, 1898.)

4 Sheets-Sheet 4.

(No Model.)

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UNITED STATES- PATENT CFFIQE.

O'ITMAR MERGENTHALER, OF BALTIMORE, MARYLAND, ASSIGNOR TO THE OTT. MERGENTHALER COMPANY, OF. SAME PLACE;-

AUTOMATlC MILLING-MACHINE;

SPECIFICATION forming part of Letters Patent No. 636,917, dated November 14; 1899. Application filed MaylZ, 1898. erial No. 680,503. (No model.)

To all whom it may concern:

Be it known that I, OTTMAR MERGENTH LER, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Automatic Milling-Machines, ,of which the following is a specification.

My invention relates to automatic milling machines, and especially to that class of antomatic milling-machines wherein it is designed to actupon the two opposite sides of the work in a single operation of the machine.

Although it will be understood that my improved machine is capable of general appli-' cation Wherever it may be desired to operate upon a series of blanks, it is shown and described herein as employed in connection with the manufacture of matrices for use in linotype-machines-such, for example, as those shown and described in Letters Patentof the United States Nos. 436,531 and 436,532, granted to me on the 16th day of September, 1890. Y

In my improved machine I have provided means whereby the work is tightly held and clamped uponja suitably-actuated reciprocating slide or table, which in its movement in one direction carries the work past and in contact with a suitablyactuated cutting mechanism, whereby one side of the work is operated upon, and which in its return movement carries the work past and in contact with the same cutting mechanism, the position of which, however, has been so changed and shifted as Because it to act upon the other side of the work. I have further provided suitable means for effecting the reciprocation of the slide or table and for changing the position of the cutting mechanism and for looking it securely in its adjusted positions. I have also provided suitable mechanism for edecting the automatic throw-out of the camshaft at the end of a complete reciprocation of the feed-slide, together with other novel and useful devices adapted for employment in my improved machine.

My invention, then, consists in the novel construction and combination of parts hereinafter to be described in the specification and finally pointed out in the claims.

Referring now to the drawings, Figure 1 is a top plan viewof my improved milling-machine. Fig.2 is a right-hand side View of the machine. Fig. 3 is a vertical sectional view of a portion of the machine, taken substantially on the section-line 3 3 in Fig. 2. Fig.

4 is a vertical sectional View of the machine, taken substantially on the line 4 4 in Fig. 1-. Fig. 5 is a detached sectionalview showing the mode of action of the cutter, upon the work. Fig. 6 is a detached detail view showing the special form of chuck or work-holder employed.

The frame A of the machine is or may be of any suitable form or construction, provided only that it possesses strength and ri gidity to sustain the operating parts. The frame A is provided with a suitable guideway A", upon which the feed slide or table F is adapted to reciprocate, and also. with the brackets A A for retaining the slide F in position.

Power is imparted to the machine by the customary fast and loose pulleys B upon the main shaft B of the machine. Also fast upon the main shaftB is the driven pinion 13*, which gears into and turns the pinion K and also the worm-screw B which gears into and turns the worm-gear B The worm-gear B is fast upon and imparts motion to the shaft 13, carrying the worm-screw B, which in turn gears into and turns the worm-gear B fast upon the cam-shaft 0, thereby imparting motion thereto. The shaft B is journaled at one end in the pivotal bearing B which is supported upon the shaftB in such manner as to be capable of turning thereon, and at the other end is journaled in the pivotal bearing 13 in the arm D, which is fast upon the rock-shaft D Also attached to the rock-shaft D is the arm D, which is connected by means of the spring D to the frame A in such manner that the normal tendency of the spring D will be to turn the rock-shaft D thereby raising the 5 bearing B of the shaft B and turning the bearing B about the shaft B in such manner that the, worm-screw'B is lifted out of engagement with the worm-gear 13*, thereby stopping the rotation of the cam-shaft C. In I00 order to overcome the tendency of the spring D to lift the worm-screw B out of engagement with the worm-gear B I have provided an arm E, fast upon the rock-shaft E suitably journaled in the frame of the machine, and having at its other end an arm or trigger E the function of which will be hereinafter described. The spring E, attached to the arm E and to the main frame, normally tends to draw the arm E outward and into contact with the pin D on the arm D. Attached to the outer end of the rock-shaft D is the handle D whereby the rock-shaft D may be turned in such manner as to act against the spring D and to lower the worm-screw B into engagement with the worm-gear 13 at which time the spring E, acting on the arm E, will cause the latter to engage the pin D on the arm D, thereby securing the arm D, shaft B and worm-screw B in operative position. Through the parts thus described it will be seen that a continuous rotation of the cam-shaft C will be secured until the arm E is freed from engagement with the pin D which is effected in the reciprocation of the feed slide or table F by the pin F on said slide or table coming into contact with the arm or trigger E thereby permitting the spring D to raise the worm-screw B and to stop the rotation of the cam-shaft C in the manner previously described.

The pinion 13 as previously described, gears into and turns the pinion K, which is loose upon the rock shaft or rod K, the pinion Kin turn meshing into and imparting motion to the gear L, fast upon the cutterspindle L. The cutter-spindle L carries the cutters L and is suitably journaled in the frame L which is supported upon the rockshaft K in such manner as to be capable of a partial rotation therewith and to permit of the shifting of the cutters L from one operative position to the other. Also attached to the rock-shaft K are the two arms M and M, set angularly with relation to each other, and whereby the rock-shaft K and the cutterspindle L and cutters L may be locked in their several operative positions. The camshaft 0 carries the cutter-shifting cam I, and the worm-gear B is provided with the campieces H H, which control the locking and unlocking of the arms M and M. The cam I effects the shifting of the cutters L from one operative position to the other by reason of its contact with the roller L carried on the cutter-support L, and is so shaped and timed as to raise and lower the cutters L after each longitudinal movement of the feed slide or table F. To effect the locking of the cutter-frame L and of the cutters L in their adjusted positions by means of the locking-arms M and M on the rock-shaft K, aspreviously described, I employ the locking-detent M The detent M is fast upon the rock-shaft M which is suitably journaled in the bearing M, and which also carries the arm M provided with the roller M adapted to be acted upon by the cam-pieces II 11 on the gear 13*. Also attached to the arm M are the cord M and weight M so arranged that the arm M will be normally held in its lowermost position, thereby causing the detent M to engage with and firmly hold one or other of the arms M and M. It will be apparent that when the arm M is engaged and held by the detent M the cutter-frame L the spindle L, and the cutters L will be firmly held in their uppermost operative position and that when the arm M is engaged and held by the detent M the cutter-frame L spindle L, and cutter L will be firmly held in their lowermost operative position. The cam-pieces II II are so shaped and located upon the gear 13 that during the rotation of the cam-shaft O the arm M will be lifted against the force of the weight M thereby releasing the arm M or M at the proper time to permit of the shifting of the cutter-frame L spindle L, and cutters L As shown on the drawings, the feed slide or table F is so formed as to be suitably guided and held upon the guideway A of the frame A. The slide or table F is provided at its upper surface with the piece F which may be adjustably secured throughout the length of the slide or table F by means of the set-screws F F. The piece F is adapted to receive and firmly retain the chuck or workholder G by means of the set-screws F F. The work-holder or chuck G is shown in detail in Fig. (l and is provided with the separable part G, attached to the main portion G by the bolts or screws G and with the retainingscrew G whereby the work may be firmly held and retained. In practice I have found that the detachable chuck or work-holder G may be employed with great advantage and with a considerable saving of time, as in the various milling operations which are necessary in the manufacture of the matrices above referred to I am enabled to clamp the work securely in position in the chuck or workholder, which may be placed in one machine after another without removing the work therefrom.

The feed of the slide or table F is effected and controlled by the cam J upon the camshaft 0 in the following manner: Pivotally attached to the slide or table F is the link J, connected to the lever J pivoted to the frame of the machine. The lever J is provided with the roller .1 so placed as to be acted upon by the cam J. Also attached to the slide or table F is the cord N, which passes over the pulley N to a weight. (Not shown.) The action of the weight and the cord N upon the slide or table F normally tends to advance the slide or table F. This action is, however, resisted and controlled by means of the parts previously described, the cam J being so shaped and timed, as clearly shown in the drawings, as to effect the longitudinal reciprocation of the slide or table F, and consequently of the work carried thereby.

Having now described the construction and arrangement of the various parts of my improved machine, their operation will be un- IIO derstood to proceed in the following manner: The blanks X or other work having been previously placed or confined within the chuck or work-holder G, the .latter is firmly secured at the proper point upon the table or slide F. The handle D is then raised in such manner as to bring the worm-screw B into engagement with the worm-gear B upon the camshaft 0, in which position the parts are held by the engagement of the spring-actuated arm E with the pin D upon the arm-D. Motion being imparted to the machine, the cutters are suitably actuated and the table F is fed or reciprocated by means of the parts previously described in such manner as to bring the blanks or work X past and in contact with the cutters L which at this period of the operation of the machine are held securely in their uppermost position by reason of the engagement of the detent M with the arm M. After the work X has been carried past the cutters L the outward movement of the slide or table ceases, and due to the configuration of the cam J its return movement begins. At this point of the operation one of the campieces H upon the gear B comes into contact with the roller M upon the arm M thereby raising the arm M against the force of the weight M and retracting the detentM thereby unlocking the arm M. Then the cam I in the course of its rotation permits the lowering of the cutter-frame L thereby bringing the spindle L and cutters L into their lowermost operative position. At this point the roller M passes over and out of engagement with the cam-piece H and the pull of the weight M advances the detent M in such manner as to cause it to engage with and lock the arm M, thereby firmly holding the cutters L in their lowermost operative position. The return movement of the slide or table F continues, bringing the work-holder G and the work X a second time into contact with the cutters L but upon the side of the work opposite that encountered bythe cutters during the first traverse of the slide or table F. When the table F has about reached its outermost position, the pin F carried thereby contacts with the trigger-arm E turning the rock-shaft E and tripping the arm E, thereby releasing the arm D and permitting the spring D to lift the worm-screw 13 out of engagement with the Worm-gear B thereby stopping the operation of the cam shaft. The work-holder is then removed from the slide or table F and fresh work substituted therefor,when the operation may be repeated, as described. Fig. 5 clearly shows the manner in which the cutters L act upon the work X in its lowermost position, it being apparent that an exactly identical operation of the cutters L upon the work X, but upon the opposite side of the work X, will be obtained therefrom when the cutters L are in their elevated position.

It will be obvious that many changes may be made in the details of the invention above described without departing from the spirit of my invention. Thus the number, charac ter, and location of the cutters may be varied and other substantially equivalent operating devices for the various parts may be substituted, all of which changes would be substantially comprised within the scope of my invention, which has been shown and described merely in a preferred form. Similarly it will be obvious that the machine is adapted to operate either upon gangs of blanks in the work-holder G,- or solid work may be inserted therein, as desired.

Having thus described the construction and operation of my invention, what I claim, and desire to secure by Letters Patent of the United States, is as follows:

1. In a milling-machinmthe combination of a reciprocating slide, and means for securing the work thereto, of means for holding the cutter in one position as the slide moves in one direction, and means for shifting the cutter as the slide is reversed and holding it in a second position as the slide moves in the reverse direction, whereby the cutter is adapted to operate on two separate parts of the work.

2. In a milling-machine, the combination of a reciprocating slide, and means for securing the work thereto, of a suitably-operated cutter, automatic means for shifting the cutter from one side of the work to the other, and automatic means for stopping the movement of the slide after it has made a complete reciprocation and the cutters have operated on both sides of the work.

3. In a milling-machine, the combination of suitably-actuated cutting mechanism with means for automatically shifting the cutting mechanism to a plurality of operative positions, and means for sec uring and locking the same in the various operative positions, substantially as described.

4. In a milling-machine, the combination with suitably=actuated cutting mechanism, and automatic means for shifting the cutting mechanism to a plurality of operative positions, and automatic means for locking the same in its various adjusted positions, of suitably-actuated feeding mechanism for carrying the work past and in contact with the cut ting mechanism, substantially as described.

5. In a milling-machine, the combination with suitably-actuated cutting mechanism, means for shifting the same to a plurality of operative positions, and means for locking the same in the various adjusted positions, of suitably-actuated feeding devices for causing the reciprocation of the work in opposite directions past and in contact with the cutting mechanism, substantially as described.

6. In a milling-machine, the combination with a movable frame and acutter and arbor mounted on said frame, of a reciprocating Work-table and means for rocking the frame to shift the cutter at each reversal of the movement of the table, whereby the cutteroperates upon difierent parts of thework as the table moves in diiferent directions, substantially as described.

7. In a milling-machine, the combination with a reciprocating Work-holder,a cutter,and means for shifting the same as the work-holder reciprocates whereby the cutter is caused to operate on different parts of the work, of mechanism for reciprocating the work-holder, automatic means for throwing said mechanism out of operation, and manuallyoperated means for starting said mechanism, substantially as described.

8. In a milling-machine, the combination with a reciprocating work-holder, of a vibrating frame, a suitably-actuated cutter mounted in said frame, a cam-shaft, cams on said shaft arranged to reciprocate the work-holder and periodically shift the cutter-carrying frame, and a locking device actuated by said cam-shaft and arranged to lock the cutterframe to hold the cutter in its different operative positions.

0. In a milling-machine, the combination with a reciprocating work-holder, a vibrating frame, and a suitably-actuated cutter carried by said frame, of a cam-shaft having a connection for reciprocating the Work-holder, a cam for adjusting the cutter to one side of the work as the work-holder moves in one direction and to the opposite side of the Work as the Work-holder moves in the opposite direction, a lock for holding said cutter in diiferent positions comprising a pair of arms connected with the vibrating frame and a lever for interlocking the said arms, and cams on said cam-shaft adapted to operate said locking-le ver to lock and unlock the cutter at proper intervals, substantially as described.

In testimony whereof I affix my signature in presence of two Witnesses.

OTT. MERGENTHALER.

Witnesses:

WILLIAM H. BERRY, MURRAY HANSON. 

